142221510 has 72 divisors (see below), whose sum is σ = 383170320. Its totient is φ = 36598464.

The previous prime is 142221509. The next prime is 142221529. The reversal of 142221510 is 15122241.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 74751 + ... + 76629.

It is an arithmetic number, because the mean of its divisors is an integer number (5321810).

Almost surely, 2^142221510 is an apocalyptic number.

142221510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 142221510, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191585160).

142221510 is an abundant number, since it is smaller than the sum of its proper divisors (240948810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142221510 is a wasteful number, since it uses less digits than its factorization.

142221510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1950 (or 1918 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 142221510 is about 11925.6660191370. Note that the first 3 decimals coincide. The cubic root of 142221510 is about 521.9814808245.

Adding to 142221510 its reverse (15122241), we get a palindrome (157343751).

The spelling of 142221510 in words is "one hundred forty-two million, two hundred twenty-one thousand, five hundred ten".